Smithy Python Release (2025-09-29)

[jonathan343]

Summary

Today we are releasing new versions of the following packages. This represents our first minor version release and includes some breaking changes that improve API consistency and align with Python standards.

Package	Previous Version	New Version
smithy-core	v0.0.2	v0.1.0
smithy-http	v0.0.1	v0.1.0
smithy-json	v0.0.1	v0.1.0
smithy-aws-core	v0.0.3	v0.1.0
smithy-aws-event-stream	v0.0.1	v0.1.0
aws-sdk-signers	v0.0.3	v0.1.0

Breaking Changes

While we do our best to minimize breaking changes, some updates were necessary to ensure long-term consistency and maintainability. For full details, please refer to the CHANGELOG.md in each package’s directory. Below we’ve highlighted the most important customer-facing breaking changes.

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smithy-core

• All exceptions in smithy_core.exceptions now use the Error suffix instead of Exception, aligning with PEP 8:
  • Example: SmithyException → SmithyError

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aws-sdk-signers

Parameter renames in SigV4Signer.sign and AsyncSigV4Signer.sign:

• signing_properties → properties
• http_request → request

AsyncEventSigner changes:

• signing_properties and identity were removed from the constructor and are now required arguments to the sign method as properties and identity.
• event_encoder_cls argument was removed from the sign method and added to the constructor.

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smithy-aws-core

AWS Credential resolvers have been moved from credentials_resolvers to the identity module.

Before:

from smithy_aws_core.credentials_resolvers import EnvironmentCredentialsResolver

After:

from smithy_aws_core.identity import EnvironmentCredentialsResolver

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smithy-aws-event-stream

• The signer argument was removed from the AWSEventPublisher constructor and replaced by a signing_config parameter (type SigningConfig).

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Thank You

We appreciate your patience as we continue improving these packages. If you encounter issues or have questions, please don’t hesitate to reach out—we are here to help.